Band-brake.



C. F. SMITH BAND BRAKE.

APPLICATION FILEDAUG. w, 911

lfisfi asa Patented AuglZO, 1912 2 SHEETS-SHEET 1.

E. SMITH.

BAND BRAKE.

APPLICATION FILED AUG. 23, 1911.

P yentea Aug. 20, 1912 2 SHEETS-SHEET 2.

CHARLES E. SMITH, 01 BRIDGEPOBT, CONNECTICUT.

' BAND-BRAKE.

Specification of Letters Patent.

Iiatented Aug 26%, 1912.

Application filed August 23, 1911. Serial No. 645,640.

To all trim-m may concern:

Be it known that 1, CHARLES F. Sitrrir, a citizen of the United States, and a resident of Bridgepofi, in the county of Fairtield and State of Connecticut, have invented certain new and useful improvements in Band- Brakes, of which the following is a speciticatiou. I

This invention relates to hand brakes and has for its object to provide a brake of the class specified of high etliciency, of simple c nstruction and equally operable in either direction.

To these ends my improvements comprise parts and combinations of parts illustrated in their n'eferred form in the accompanying drawings whereinl ic'ure 1 is a side elevation of my improved brake. Fig. 2 is a plan view and Pig. 3 is a'sectional -end elevation online 3, 3 of Fig. 1 looking in the direction of arrow 1. llig. 4 is an end elevation of a portion of Fig. 1 looking in the direction of arrow 4;. Fig. 3 is a plan view of the hand portion of my brake unwrapped and laid tiat. Fig. (3 is a side elevation similar to Fig. 1 and illustrating a modification of my improvements.

.l ig. 7 a view 'similar to Fig. 42 and illustrating a modification of the showing of said Fig. 4.

For convenience of illustration l have shown my improvements applied to an .au-

tomobile type of vehicle, wherein supporting frame 2 of the machine has bearing for the rotation therein of axle (3. Brake cyl inder 7 is fixed to axle (S for rotation therewith. lvrappcd about said cylinder 7 is brake hand 8 comprising a relativelyshort middle portion 9 and two portions l0, 11v extending circl'u'uferentially therefrom in opposite directions (Fig. 13), Said middle portion 9 is of full-width or apl'iroximatcly of the width of cylinder 7 while portions 10, 11. are of half-width and are widthwise oppositely disposed relatively to said middle portion 9. so that when said band 8 (Fig. is wrapped around cylinder 7, ends 12. 1?) of portions 10, 11 respectively, approxr mately meet said middle portion 9 and said band substantially twice encircles said cylinder and covers .substantially all the face thercol Haid middle portion 9 is provided with :ar l t riveted thereto at 15, 15 and ends l2, l3 of portions 10, ll have cars l6, l7 riveted thereto, all respectively. Said ear ll is connected to car 18 of frame 2 by bolt 19 and slotted at 20 to permit move ment of said car 14- and hand 8 radially of axis (3 butv not eircumferentially thereof. Frame '2 is provided with ears Q1. 22 in which are pivotally mounted at 34, 35 one end of levers Q 3, 24; all respectively. The other ends of said levers are connected by links 25. 26 to opposite ends of rock lever 27, all respectively. Said rock lever 27 is fixed to shaft .28 mounted in bearing 29 in the outer end of car 18. To the outer end of said shaft 28 is fixed arm 30 connected at its outer end with the usual pull rod 31. Ears 16, 17 are connected by links 32, 33 to levers 23, it near pivots 34, 35 all respectively. Dian'ietrally opposite middleportion 0 (Figs. 1 and 4) half-width portions 10, ll are provided with means for circumferentially freeing band 8 from cylinder 7. F aid means comprise cars 36, 37 tixed to said portions 10. 11 respectively. A butments 38. fi-tl inreaching from frame 2 have push screws 40 mounted therein for engagement with springs as 41 interposed between said cars 36. 37 and said push screws as 40. Thus by suitably adjusting said set screws band portions 10, ll. may be returned to their normal and inactive positions after having been disturbed therefromlf cylinder 7 is rotated in clockwise direction (Fig. l) and rod illv be pulled l'ialf width portion it) of hand 8 will be wrapped around said cylinder with maximum effect and halfwidth portion 11 will have less cll'ect as the clocl-:wise rotation of said cylinder tends to unwrap said portion ll. if cylinder 7 is rotated in anti cloclcwise direction the relative etliciem'y of HHTlll'Ml'fi l0, '11 will be re.- vcrsed. it will thus be seen that my improved brake is of equal etlicieucy when said cylinder is rotated in either direction. lf it is desired to utilizc the whole length of said hand 8 for euwrappino' cylinder 7 in the direction of it rotation the modification of Figs. (3 and 7 may be em ployed. Therein tars it, 9? of frame 2 are provided with stops or abutments -11. 4-23 for engagement with simi ar abutmcuts til. 4-lof cars l6, 17 a l respe t"!vcly of band Sf Middle car 14- of band 8 is omitted and car 18 of frame 2 is connected with shaft 28 by linlt 45 whereby said shaft and the parts su 'iportod thereon are sufficiently mcbilc to permit abut.- n'lents 42. 44 to engage when cylinder 7 rotates in clockwise direction (Fig. (3). Then upon milling rod 31 car 16 is moved upwardly and the two coils of hand 8 are wrapped around cylinder 7. If said cylin- 'mcnts ll, 4:3 will engage and.

der 7 rotates in anti-clockwise r rod 81, ear 1'? will be moved, and the two coils of bond 8 will he v around said cylinder in the opposite direc-' tion. ll ith this modification It preiembly employ the simple means oi Fig. '1? or tree-- ing the band circumlferentially from said cylinder. Ther in each member 10, 11. has an ear l8 overhanging the other member and spring; l? is interposed. lietweenssid cars to move ssidmeinhers 10, ll circumferentielly relatively to each other to cause chutinent-s 43, 4.4 of cars 16, 17 to engage ahutments All, 42 of fired ears 21, 252

While my improvements are particularly adapted for vehicle brakes, as for instance for automobiles, they are obviously adopted for transniisison means and it will be ohvious to those skilled in the art that my improvements may be modified in inuny Ways and applied to other ends than those illustrated all Within the spirit and. scope of my invention.

, I am aware th at flexible bands of uniform Width substantially encircling a cylindrical drum and provided with toggle or corn means for drawing the ends thereof together to bind said cylinder are Well known; llso that helically Wound frictional members of rope or metal of uniform Width have been used for h 'alte bond purposes and I do not broadly claim such construction.

What I do claim is:

1, A hand brake including in. combination, a supporting frame, :1 cylinder mounted for rotation relative thereto, a flexible hand about said cylinder comprising a. relatively short middle portion of full-Width and two widthwise oppositely disposed half-width portions-extending circuinfcrentially in opposite directions respectively from said middle portion, means for drawing the ends of said half-Width portions to substantial meeting with said middle portion circuin'tercin ticlly toward each other and inenns, opposite the means for drawing the ends toward each other, for circuinferenl'ially freeing said hand from sold cylinder.

2. A hand brake including; in comhination,

' 21 supporting trume, a cylinder mounted for rotation relative thereto, a flexible bond about said cylinder comprising :1 relatively short middle portion oi full-Width and two Widtho iso oppositel disposed halt-width portions extending; ctrnonl crentiully in ppposits directions respectively from said i'uid e-supporting frame,- a cylind r mounted for rotation. relative thereto, a flexible bend substantislly encircling said cylinder comprisii a. relatively short middle portion of full-Width and. two 'widthwise oppositely disposed. half-Width. portions extending circuniferontiellyf in opposite directions respectively from said middle portion to substantial meeting therewith, means connectssid hand and frame tor'preventing said hand :lroni rotating with said cylinder, means for drawing the ends of seidholiwidth portions circum'ierentially toward each other and means, opposite the means for drawing the ends toward each other, for urging the two half-Width port-ions circum-. ferentislly in opposite directions for freeing said hand from said cylinder.

4. A hand brake includingin combination, a supportmg frame, o cylinder mounted for rotation relative thereto, a flexible band about said cylinder comprising a relatively short middle portion of full-Width and two widtlrvrise oppositely disposed half-width portions extending circunifcrentially in op posits directions respectively from said middle portion, means connecting said hand and i {ii no for preventing said band from rotat-' ing with cylinder, means for drawing the ends of said half-Width portions circuinterentielly toward each other and means, opposite the means for drawing the ends toward each other, for urging the two halfwiclth portions circuinferentiolly in opposaid cylinder.

5. it flexible broke band adapted to be w'npped about a cylinder, comprising a relatively short middle portion of full-Width, two widthwisc oppositely disposed halfwiclth portions extending lengthwise in opposite directions respectively from said middle portion to substantial meeting there with and menus, opposite the means for drawing the ends toward each other, for cir- Sll'B directions for freeing said band from cuinferentizilly freeing said bond from said cylinder. 1

6. A cylinder, :1 flexible broke hand adaptcd to be wrapped about said cylinder, com.- prising a relatively short middle portion of iiull-n'idth and two widthwisc oppositely disposed halt-Width portions "extending lcnotlm'ise in opposite directions respectively from said middle portion to substanl z nicotin therewith, means for drawing d halt-iv h portions toward one another shout the cylinder and 'uicons opposite the means for drawing! the ends toward each other, for crying the two linlf-n'idtl'i pot j lions oircumictcntinLy in opposite directlons for irocinn' said band from said. cylini Y (2C 1i cylinder. a flexible lorakehantl adeptcd to be wrapped substantially twice around aid cylinder, moons for drawing ends lee of said band toward each other about said cylinder and means opposite said drawing means for urging the two portions of said band in directions opposite to the directions r spectively in which they are drawn by the e (1 drawing means.

8. .A. cylinder, a' flexible brake band adapted to be wrapped substantially twice about said cylinder, comprising a relatively short middle portion of full-width and two Widthwise oppositely disposed half-width portions extending lengthwise in opposite directions respectively from said middle portion to substantial meeting therewith, means for drawing said half-width portions toward one another about said cylinder and means, opposite the means for drawing the half-width portions toward one another, for

urging one'portion of said band in a direction opposite to the direction of rotation of the cylinder and means for urging the other portion of said band in a direction opposite to the direction of rotation of. said cylinder when that cylinder is rotating in a direction opposite to the first mentioned direction.

9. A hand brake including in combination, a supporting frame, a cylinder mounted for rotation relative thereto, a flexible band about said cylinder, means for drawing the ends of said band circumferentially toward each other comprising opposite levers fulcrumed in said frame, a rock lever pivoted midway its length in said frame between said opposite levers, links connecting the free ends of said opposite levers with the ends of the rock lever, and links connecting said opposite levers with the ends of said band. a

10. A hand brake including in combination, a supporting frame, a cylinder mounted for rotation relative thereto, a flexible band about said cylinder, means for drawing the ends of said band circumferentially toward each other comprising opposite levers fulcrumed in said frame, a rock lever pivoted midway its length in said frame between said opposlte levers, links connecting the free ends of said opposite levers with the ends of the rock lever, links connecting said opposite levers with the ends of said band, and means for adjusting the lengths, respectively, of one pair of links.

11. A hand brake including in combination, a supporting frame, a cylinder mounted for rotation relative thereto, a flexible band about said cylinder comprising a relatively short middle portion of full-Width and two widthwise oppositely disposed half-width portions extending circumferentially in opposite directions, respectively, from said middle portion to an approximate meeting with said middle portion, means for drawing the ends of said half-width portions circumferentially toward each other comprising opposite levers fulcrumcd in said frame, a rock lever pivoted midway its length in said frame between said opposite levers, links connecting the free (lids of said oppo site levers with the ends of said rock lever, and links connecting said opposite levers with the ends of said half-width portions.

12. A hand brake including in combination, a supporting frame, a cylinder mounted for rotation relative thereto, a flexible l about said cylinder comprising a IQlYttlVt short middle portion of full width and two widthwise oppositely disposed half-width portions extending circumferentially in opposite directions, respectively, from said middle portion to an approximate meeting w1th said middle portion, means for drawing the ends of said half-width portions circumfercntially toward each other comprising opposite levers fulcrumed in said frame,

a rock lever pivoted midway its length in said frame between said opposite levels, links conncting the free ends of said opposite levers with the ends of said rock lever, links connecting said opposite levers with the ends of said half-width portions, and means for holding .the middle portion of said band against rotation relative to said frame. I

13. A band brake including in combination, a supporting frame, a cylinder mounted for rotation relative thereto, a flexible band about said cylinder comprising a relatively short middle portion of full-width and two widthwise oppositely disposed half-width portions extending circumferentially in opposite directions, respectively, from said middle portion to an approximate meeting with said middle portion, means for drawing the ends of said half-width portions circumferentially toward each other comprising opposite levers fulcrumed in said frame, a rock lever pivoted midway its length in said frame between said opposite levers, links connecting the free ends of said opposite levers with the ends of-said rock lever, links connecting said opposite lovers with the ends of said half-width portions and. means for adjusting the lengths, respectively, of one pair of links.

Signed this 21st day of August 1911, at New York, N. Y., before two subscribing witnesses.

oneness r. SMITH.

Witnesses:

LA For G. BARBER, sCI-IUYLER N. PnoKHAM. 

